Improved bench-vise



UNITED STATES PATENT (")EEIcltQ JOHN s. HoAE, or wEsr AoToN, MASSACHUSETTS? IMPRovi-:D BENCH-WSE.

Specific-ation forming part of Letters Patent No. 55,656, dated June 19, 1866.

To all whom it may concern:

Be it known that I, JOHNS. HOAR, ot' lVest Acton, of the county of Middlesex and State of Massachusetts, have invented an Improved Bench-Vise; and I do hereby declare the same to be fully described in the following specilication, and represented in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a t'ront elevation; Fig. 3 aside elevation, and Fig. 4 a vertical and longitudinal section, of'l it.

1n the said drawings, A denotes the bed- Iplate for supporting the vise. This bed-plate is intended to be let into and screwed down to a bench-top, and it is to have a pivot-hole, a, made through it, the said hole being to receive a pivot, b, to project down from the bottom plate ot' 'the stationary jaw-carrier B of the vise.

The bottom part of such jaw-carrier B is a Hat plate, c, provided with three slots arranged in it, as shown at l ce, each of which is curved to the arc ot' a circle having its center in the axis ot' the pivot I). There is aset-screw,f, to each slot, the screw going down through the slot and being screwed into the supportplate A.

From the plate e guide-plates h h rise upward parallel to each other, the stationary jaw C being supported by a cap, t, which extends l'rom one guide-plate to the other.

. The jaw C, the cap fi, the guide-plates h h, and the plate c are to be cast in one piece ot' metal.

The shank Eof themovable jaw Dis grooved lengthwise, as shown at k, in order to receive the screw F and the standard G, elnployed for giving motion to the movable jaw. Such standard extends up from the plate c, and has the screw F screwed through it. The screw should be so applied to the movable jaw-shank as to be stationary relative thereto, except in being capable ot' being revolved so as to effect the movements ot' the shank, such as to cause the movable jaw to either approach or recede from the stationary jaw.

The arrangement of the jaws is such as to cause their middles to extend beyond a vertical line passing through one side of the jawshank E 5 or, in other Words, each jaw is arranged so as to extend nearly, if not entirely, beyond such line. The object of this arrangement of the jaws is to enable any long articleq when projecting below them, to be held by them without interference from the shank, such article extending down by the side of the shank, my said arrangement attording more scope to the use ot' the vise than exists when the jaws are arranged in the ordinary manner with respect to their carriers-that is, so that each jaw shall have its middle directly over the axis of its carrier or shank.

By constructing' the stationary jaw-carrier with the three slots'arranged in i-t as specified, the back slot and its screw will servenot only to attord greater stability to the whole vise, but to prevent the metal at the side or shorter slots Jfrom being broken while the vise may be in use.

l do not claim the single back slot, d, and its clamp-screw f, in connection with a frame provided with a pivot, and to turn on another frame or bed'plate, as this is common to many machines.

I employ the back slot and its clamp-screw for the purpose above specified, and the side slots and their clamp-screws to counteract the lateral strain, tending to twist the jaw-carriers a-nd break them under blows on any article when held by the jaws, when extended wholly, or nearly so, on one side ot' the shank of the stationaryjaw, as specified.

My invention is a very important improvelnent on the rotary bench-vise, it rendering it very strong' and useful for many purposes to which ordinary rotary beuch-vises cannot well be employed.

Vhat l claim as a special improvement in bench-rises of the kind described, or those to turn horizontally on a bed-plate, is-

The combination ofthe long curved baci;h slot, d, and its screwf, and two side curved slots, e c, and their set-screws in the stationary jaw-carrier (l, and with the jaws C D, all constructed and arranged to operate together, substantiall y as speeih'ed.

JOHN S. HOAB. Witnesses: A

R. H. EDDY, E. P. HALE, JR. 

